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China has deployed its maritime law enforcement into the maritime area of the Diaoyu islands and military drones past remote Japanese territory as Beijing ramps up strains following the Japanese prime minister’s remarks regarding Taiwan.

Patrol Operations

On Sunday, the China's maritime patrol announced that its vessels carried out a “rights enforcement patrol” through the waters of the Diaoyu islands, which are administered by Tokyo but also claimed by China.

“Chinese maritime patrol unit 1307 conducted patrols within the maritime jurisdiction of the Senkaku islands. This was a lawful patrol operation conducted by the Chinese maritime authorities to protect its sovereign claims,” the statement said.

Diplomatic Spat

Beijing and Tokyo have consistently clashed around the disputed territory but the latest activity occur during an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, told parliament that if China attack the self-governing island of Taiwan it could trigger a armed reaction from Tokyo.

That provoked a furious reaction from China, which has signalled it expects a retraction from the Japanese official.

Taiwan's Position

China claims the island as its own territory and plans to incorporate it under what it terms “reunification”. It has left open the military option. Taiwan’s government and citizens overwhelmingly reject the prospect of Chinese rule – choosing to preserve the current situation without explicitly declaring themselves independent, but pledging to protect their sovereignty if necessary.

An attack or invasion by China would risk escalating into a international confrontation, possibly drawing in the US and other partner nations including Tokyo, which has land just 110km (68 miles) from Taiwan.

Military Activity

In Taiwan, the military authorities reported this weekend that it had observed three dozen PLA planes, seven navy ships and one government vessel, which was probably the coast guard, active near the territory over the previous day.

Official charts released showed up to multiple UAVs operating near the island and the Japanese islands off its north-east coast, seeming to travel unusually near to Yonaguni. PLA movements there are not rare, but uncommon, and Chinese military activity in the island's ADIZ generally has been minimal in recent weeks.

Earlier this weekend, the ministry said China had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It added the island had sent its own aircraft and ships to track the developments. The island documents these operations a couple of times a month as part of what Taipei says is an ongoing military pressure campaign.

Diplomatic Pressure

Japan has been experiencing increased strain from Beijing since the Japanese official made her comments, with China’s consul general in Osaka triggering an official complaint from Tokyo by stating that “the dirty head that sticks itself out must be cut off”.

Beijing then called in Japan's diplomat for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be certain to collapse.

Warning for Citizens

On Friday, China advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it provided no details.

Multiple carriers from China said on Saturday that tickets to Japan could be cancelled without penalty.

In another escalation, China’s government on the weekend advised students to rethink education plans in Japan, citing what it characterized as an unstable security environment.

Although not an outright prohibition, a dramatic reduction in the population of learners from China could have a negative impact on Japanese universities. A historic high of over 336,000 international students were studying in Japan last year, according to education statistics. They featured over 123,000 learners from China – by far the largest demographic.

Official Commentary

Late on Saturday, a official press commentary charged the Japanese official with performing a political stunt that was “not just dangerously provocative but fundamentally perverse”.

“A conflict between Japan and China would not be a small-scale encounter; it would likely draw in other powers, including the US, and could quickly spiral into a major confrontation with severe repercussions.”

Strategic Positions

The administration in Taipei says the island's residents alone determine their destiny. Japanese leaders have previously avoided discussing the island openly when addressing potential conflicts, maintaining a “strategic ambiguity” also favoured by Japan's primary defense partner, the US.

However, Beijing's governing party says the incorporation of the island with the mainland China is “inevitable”, and casts any opposition to it as escalatory. As it moves towards being capable of military annexation, Beijing has also been increasing its political operations and its statements towards the island.